TWI670908B - Discharge device - Google Patents

Abstract

A discharge device includes a box (4) including a first plate (41) and a second plate (42), and defining an internal space between the first plate (41) and the second plate (42) 2), the first plate (41) is arranged on the first side (81), and the second plate (42) is arranged on the second side (82) opposite to the first side (81) to communicate with the first plate (41) ) Opposite and has an opening (42a); a base material (3), which is arranged in the internal space (2); a discharge electrode (5), which is held on the base material (3) and is arranged so that the tip portion passes through the opening ( 42a) and protruding to the outside of the box (4); and an insulating sealing portion (7), which seals the base material (3) in the internal space (2). The surface of the first side (81) of the second plate (42) has a flat first area (45). A slope (13) is formed along at least a part of the outer circumference of the first region (45), and the slope (13) faces the first side (81) as it moves away from the outer periphery of the first region (45) tilt. Instead of the inclined surface (13), it may be a curved surface continuously changing from the first area (45).

Description

Discharge device

The invention relates to a discharge device. This application claims priority based on the Japanese patent application filed on October 20, 2017, which is Japanese Patent Application No. 2017-203484. All the contents described in this Japanese patent application are incorporated into this specification by reference.

As one type of discharge device, there is an ion generating device. The circuit module used in the ion generating device is disclosed in Japanese Patent Laid-Open No. 2004-178937 (Patent Document 1). In this device, the substrate is arranged inside the housing, and the polymer material is sealed by a mold portion. The casing has an opening on the upper side, and in the opening, the upper surface of the polymer material mold portion is exposed.

An ion generating device equipped with needle electrodes is disclosed in Japanese Patent Laid-Open No. 2015-5387 (Patent Document 2).

An ion generating device provided with a discharge electrode is disclosed in Japanese Patent Laid-Open No. 2017-33883 (Patent Document 3). The discharge electrode has a brush-shaped conductor.

Patent Document 1: Japanese Patent Application Publication No. 2004-178937 Patent Document 2: Japanese Patent Application Publication No. 2015-5387 Patent Document 3: Japanese Patent Application Publication No. 2017-33883

In general, in the ion generating device disclosed in Patent Document 1, in order to cause discharge, there are parts that are provided with a circuit that generates a high voltage and to which a high voltage is applied. In order to prevent the performance degradation caused by the occurrence of abnormal discharge between the surroundings and to ensure safety, such parts are molded by polymer materials or the like. However, the resin used as a polymer material shrinks when it is cured. Therefore, in order to reliably mold, many resins must be injected, which may hinder the miniaturization of the device. As a method for solving this problem, it is considered to cover the parts to which the high voltage is applied with a box, but in this case, the bubbles are unlikely to escape to the surface. When air bubbles remain near the parts to which a high voltage is applied, abnormal discharge may occur due to air bubbles, and performance may deteriorate. In particular, the corners of the cabinet are prone to accumulate air bubbles, which must be considered with great care. In order to ensure the reliability of the discharge device, and to achieve the miniaturization of the device, a structure in which the parts to which the high voltage is applied is covered with a box, and bubbles are unlikely to remain.

An object of the present invention is to provide a discharge device in which bubbles do not easily remain inside the box.

In order to achieve the above object, the discharge device according to the present invention includes: a box including a first plate and a second plate, and defining an internal space between the first plate and the second plate, the first plate being disposed at the first On one side, the second plate is arranged on a second side opposite to the first side to face the first plate and has an opening; a base material, which is arranged in the internal space; and a discharge electrode, which is held on the The base material is configured such that a front end portion protrudes to the outside of the box through the opening portion; and an insulating seal portion that seals the base material in the internal space. The first side surface of the second plate has a flat first area. A slope or curved surface is formed along at least a part of the outer circumference of the first area, the slope is inclined toward the first side as it moves away from the outer circumference of the first area, and the curved edge extends from the first area The continuously changing side faces the first side as it moves away from the outer periphery of the first region.

According to the present invention, since the inclined surface is provided along at least a part of the outer periphery of the first region, bubbles are not likely to stay inside the box when the resin is injected, and bubbles easily escape from the opening. Therefore, it can be used as a discharge device in which bubbles do not easily remain inside the case.

(Embodiment 1) A discharge device according to Embodiment 1 of the present invention will be described with reference to Figs. 1 to 5. The appearance of the discharge device 101 of this embodiment is shown in FIG. 1. A plan view of a part of the discharge device 101 is shown in FIG. 2. Fig. 3 shows a sagittal cross-sectional diagram related to line III-III of Fig. 2. The sagittal cross-sectional diagram related to the IV-IV line in FIG. 2 is shown in FIG. 4.

The discharge device 101 includes a case 4, a base 3, a discharge electrode 5, and an insulating seal 7. The box 4 includes a first plate 41 and a second plate 42. The first plate 41 is disposed on the first side 81. The second plate 42 is disposed on the second side 82 opposite to the first side 81 It faces and has an opening 42a. The box 4 defines an internal space 2 between the first plate 41 and the second plate 42. The base material 3 is arranged in the internal space 2. The discharge electrode 5 is held by the base material 3 and is arranged such that the tip portion protrudes to the outside of the case 4 through the opening 42 a. The discharge electrode 5 may be a needle electrode, for example. Here, as an example, it is shown that the discharge electrode 5 is a needle electrode, but the discharge electrode 5 may be an electrode of another form. The insulating sealing portion 7 seals the base material 3 in the internal space 2. The base material 3 may be a substrate, for example, a printed wiring substrate.

The surface of the first side 81 of the second plate 42 has a flat first area 45. The inclined surface 13 is formed along at least a part of the outer periphery of the first region 45, and the inclined surface 13 is inclined toward the first side 81 as it moves away from the outer periphery of the first region 45. FIG. 5 is a plan view of a portion showing the section where the inclined surface 13 is provided in the present embodiment by hatching. The inclined surface 13 formed on the back side of the second plate 42 is not directly visible when the discharge device 101 is viewed from above, but it is assumed to be visible through the inclined surface 13 here. Here, as an example, the slope 13 is formed so as to follow only a part of the outer periphery of the first region 45.

The discharge device 101 includes components 16 and 17 inside the case 4. Of these, at least the part 16 is the one to which the voltage is applied. The part 16 may be a high voltage applied. The parts 16 and 17 are sealed by the insulating sealing part 7 in the same manner as the base material 3.

In this embodiment, since the inclined surface 13 is provided along at least a part of the outer periphery of the first region 45, the bubbles do not easily stay inside the case 4 during resin injection, and the bubbles easily escape from the opening 42a. Therefore, according to the present embodiment, it can be used as a discharge device in which bubbles do not easily remain inside the case 4.

In this embodiment, as shown in FIG. 5, the slope 13 is provided along at least a part of the outer periphery of the first region 45. On the other hand, another example is shown in FIG. 6. In FIG. 6, the inclined surface 13 is provided in more sections in the outer periphery of the first area 45. As shown in FIG. 6, the inclined surface 13 is preferably formed over the entire circumference of the outer periphery of the first region 45. By adopting this configuration, the bubbles can be discharged from the box 4 more reliably.

Furthermore, in the description so far, although the concepts of "first board" and "second board" have appeared, the so-called "board" is not limited to a flat board, but is meant to include a board with irregularities , Partly or wholly bent, etc. are somewhat deformed. In addition, it also means a plate-shaped portion including parts in which a plate-shaped portion and a non-plate-shaped portion are connected and integrated. The same applies to the following description.

In addition, the configuration shown in this embodiment can be applied to a discharge device that generates ions, electrons, radicals, and the like. The configuration shown in this embodiment can be applied to a discharge device that generates active species such as ozone. Furthermore, the ions generated by the discharge device may be only positive ions or only negative ions. The discharge device may be a generator that generates both positive and negative ions.

(Embodiment 2) A discharge device according to Embodiment 2 of the present invention will be described with reference to FIG. 7. The cross-sectional view of the discharge device 102 of this embodiment is shown in FIG. 7. The basic configuration of the discharge device 102 is the same as that described in Embodiment 1, but differs in the following points.

The discharge device 102 includes a box 4i instead of the box 4. The box 4i has a curved surface 15 instead of the inclined surface 13 described in the first embodiment. That is, the discharge device 102 is provided with a curved surface 15 along at least a part of the outer circumference of the first region 45, and the curved surface 15 continuously changes from the first region 45 while moving away from the outer periphery of the first region 45 The first side 81.

In this embodiment, since the curved surface 15 is provided along at least a part of the outer periphery of the first region 45, bubbles are not likely to stay inside the case 4i when resin is injected, and bubbles easily escape from the opening 42a. Therefore, according to this embodiment, it can be used as a discharge device in which bubbles do not easily remain.

The curved surface 15 is preferably formed over the entire circumference of the outer periphery of the first region 45 as in the case where the inclined surface 13 was described with reference to FIG. 6 in the first embodiment. By adopting this configuration, bubbles can be more surely expelled from the box 4i.

(Embodiment 3) With reference to Fig. 8, a discharge device according to Embodiment 3 of the present invention will be described. The discharge device of this embodiment includes a box 4j instead of the box 4. The cross-sectional diagram of the box 4j is shown in FIG. In the case 4j, the inclined surface 13 extends in a planar shape so as to reach the second region 46 from the first region 45. The composition of other parts is the same as that explained so far, so the description will not be repeated.

Even with such a configuration, the bubbles that can be used when the resin forming the insulating sealing portion 7 is injected are easily discharged, and the bubbles are not likely to remain.

(Modification of Embodiment 3) Furthermore, it may be configured as shown in FIG. 9. In the example shown in FIG. 9, the discharge device includes a box 4k instead of the box 4j described in the third embodiment. In the case 4k, the curved surface 15 is provided to reach the second area 46 from the first area 45. The curved surface 15 is continuously connected with the first region 45, but discontinuously connected with the second region 46. The curved surface 15 may also be perpendicular to the second area 46. Even with this configuration, the same effect can be obtained.

(Embodiment 4) With reference to Fig. 10, a discharge device according to Embodiment 4 of the present invention will be described. The discharge device of this embodiment includes a box 4u instead of the box 4. The cross-sectional diagram of the box 4u is shown in FIG. In the case 4u, the second plate 42 has a first area 45, but no second area 46. In such a configuration, the slope 13 is provided along at least a part of the outer periphery of the first region 45. The composition of other parts is the same as that explained so far, so the description will not be repeated.

Even with such a configuration, the bubbles that can be used when the resin forming the insulating sealing portion 7 is injected are easily discharged, and the bubbles are not likely to remain.

(Modification of Embodiment 4) Furthermore, it may be configured as shown in FIG. 11. In the example shown in FIG. 11, the discharge device includes a box 4v instead of the box 4u described in the fourth embodiment. In the box 4v, a curved surface 15 is provided instead of the inclined surface 13. Even with this configuration, the same effect can be obtained.

(Embodiment 5) With reference to Fig. 12, a discharge device according to Embodiment 5 of the present invention will be described. The basic configuration of the discharge device 103 is the same as that described in the first embodiment, but differs in the following points. The discharge device 103 includes a component 16. The part 16 is arranged in the internal space 2. The part 16 is applied with voltage. In the discharge device 103, if the height of the first area 45 when viewed from the surface of the second side 82 of the first plate 41 is set to the first height H1, the second plate 42 includes the second area 46, and the second area 46 is viewed from the surface of the second side 82 of the first plate 41 and is located at a second height H2 lower than the first height H1. The component 16 is arranged in an area where the first area 45 is projected toward the first plate 41. The surface of the second side 82 of the part 16 is closer to the second side 82 than the second region 46.

By adopting the configuration shown in this embodiment, the height of the second plate 42 can be made lower than the height of the part 16 outside the periphery of the part 16, and the amount of necessary resin can be reduced. The component 16 to which the voltage is applied is arranged in the projection area of the first area 45, and at least a part of the outer periphery of the first area 45 is provided with the inclined surface 13, so that it has the following structure: When the resin for forming the insulating seal portion 7 is injected, It becomes easy to remove air bubbles around the part 16, and the air bubbles do not easily remain around the part 16. As a modification of the present embodiment, a configuration in which the curved surface 15 is provided instead of the inclined surface 13 may be adopted in the above-mentioned configuration.

In the example shown here, the component 16 is mounted on the surface of the second side 82 of the first plate 41, but this is only an example. The part 16 and the first plate 41 are not necessarily in contact. For example, it may be configured such that the component 16 is fixed to the base material 3 or the like in any form, and the component 16 floats from the first plate 41.

In addition, although any of the embodiments so far can be said to be common, the discharge electrode 5 is preferably an ion generating electrode. The discharge device preferably includes, for example, the discharge electrode 5i shown in FIG. 13. The discharge electrode 5i is a brush electrode and is an ion generating electrode. The discharge electrode 5i has a structure that bundles a plurality of fibrous conductors 5ia and binds one end thereof with a fixture 5ib, and a rod-shaped portion 5ic that supports these. The other end of the fibrous conductor 5ia is not bound and can be freely expanded. The form of the ion generating electrode is not limited to the brush electrode shown in FIG. 13, and various other forms are also possible. As the form of the ion generating electrode, for example, various types such as a rod shape, a linear shape, a fibrous shape, and a planar shape are considered.

In addition, although FIG. 1 shows an example in which one discharge device 101 includes two discharge electrodes 5, the number of discharge electrodes may be other than two. For example, one discharge device may have only one discharge electrode. One discharge device may be provided with more than three discharge electrodes. In the first embodiment and the like, although an example in which one discharge electrode 5 is disposed in one opening 42a is shown, it may be that two or more discharge electrodes are disposed in one opening. In the first embodiment and the like, although the shape of the opening 42a is rectangular, the shape of the opening for arranging the discharge electrodes may be other than rectangular.

In FIG. 1, a structure for protecting the discharge electrode 5 is arranged around the discharge electrode 5, but this is only an example. In fact, according to the known technology, in order to prevent other parts or the fingers of the operator from colliding with the discharge electrode, it is preferable to provide some protection structure around the discharge electrode 5. As the protective structure, for example, a frame-shaped component having a height higher than that of the discharge electrode 5 is considered. The height here refers to the height when the upper surface of the box is used as a reference. By providing some protection structure, the discharge electrode 5 can be prevented from being damaged. Furthermore, by providing some protective structure, it is possible to prevent the operator from accidentally touching the discharge electrode 5 and feeling pain or injury.

In addition, a plurality of the above-described embodiments may be appropriately combined and used. In addition, all the aspects of the above-mentioned embodiment disclosed this time are illustrative and not restrictive. The scope of the present invention is expressed by the scope of patent application, and includes the meaning equivalent to the scope of patent application and all changes within the scope.

2‧‧‧Internal space

3‧‧‧ Base material

4, 4i, 4j, 4k, 4u, 4v‧‧‧

5, 5i‧‧‧ discharge electrode

5ia‧‧‧fibrous conductor

5ib‧‧‧Fixture

5ic‧‧‧Bar-shaped part

7‧‧‧Insulation seal

13‧‧‧Bevel

15‧‧‧Surface

16, 17‧‧‧ Parts

41‧‧‧ First board

42‧‧‧Second board

42a‧‧‧Opening

45‧‧‧ First area

46‧‧‧Second area

81‧‧‧ First side

82‧‧‧Second side

101, 102, 103 ‧‧‧ discharge device

1 is a perspective view of a discharge device according to Embodiment 1 of the present invention. 2 is a partial plan view of a discharge device according to Embodiment 1 of the present invention. FIG. 3 is a sagittal cross-sectional view related to line III-III of FIG. 2. FIG. 4 is a sagittal cross-sectional view related to line IV-IV of FIG. 2. FIG. 5 is an explanatory diagram of an example in which a slope is provided in a discharge device according to Embodiment 1 of the present invention so as to follow only a part of the outer periphery of the first region. 6 is an explanatory diagram of an example in which a slope is provided in the discharge device according to Embodiment 1 of the present invention so as to cover the entire circumference of the outer circumference of the first area. 7 is a cross-sectional view of a discharge device according to Embodiment 2 of the present invention. FIG. 8 is a partial cross-sectional view of a box included in a discharge device according to Embodiment 3 of the present invention. 9 is a partial cross-sectional view of a case provided in a discharge device according to a modification of Embodiment 3 of the present invention. FIG. 10 is a partial cross-sectional view of a box provided in a discharge device according to Embodiment 4 of the present invention. FIG. 11 is a partial cross-sectional view of a box included in a discharge device according to a modification of Embodiment 4 of the present invention. 12 is a cross-sectional view of a discharge device according to Embodiment 5 of the present invention. 13 is a perspective view of an example of a discharge electrode that can be provided in a discharge device according to each embodiment of the present invention.

Claims (5)

A discharge device is characterized by comprising: a box including a first plate and a second plate, and defining an internal space between the first plate and the second plate, the first plate being disposed on the first side, The second plate is arranged on a second side opposite to the first side to face the first plate and has an opening; a base material, which is arranged in the internal space; a discharge electrode, which is held on the base material, And the front end portion is configured to protrude to the outside of the box through the opening portion; and the insulating sealing portion seals the base material in the internal space; the first side surface of the second plate has a flat first area , A slope or a curved surface is formed along at least a part of the outer circumference of the first region, the slope is inclined in a manner of moving away from the outer periphery of the first region toward the first side, and the curved side is from the first The continuously changing area of the area faces the first side as it moves away from the outer periphery of the first area. A discharge device as claimed in item 1 of the patent application, wherein the inclined surface or the curved surface is formed over the entire circumference of the outer circumference of the first region. For example, the discharge device according to item 1 or 2 of the patent application scope, which includes parts arranged in the internal space and to which voltage is applied, if the height of the first region when viewed from the surface of the second side of the first plate Set to the first height, the second plate includes a second area, the second area is located at a second height lower than the first height when viewed from the surface of the second side of the first plate, the part is disposed at In the area where the first area is projected toward the first plate, the surface of the second side of the part is closer to the second side than the second area. A discharge device as claimed in item 1 or 2 of the patent application, wherein the discharge electrode is an ion generating electrode. A discharge device as claimed in item 3 of the patent application, wherein the discharge electrode is an ion generating electrode.